From befe6b4967a161cbee0bd17a185f56bc9a0da1fd Mon Sep 17 00:00:00 2001
From: whitequark <cz@m-labs.hk>
Date: Sat, 26 Jan 2019 18:24:12 +0000
Subject: [PATCH] compat.genlib.resetsync: add shim for AsyncResetSynchronizer.

---
 doc/COMPAT_SUMMARY.md             |  4 ++--
 nmigen/compat/genlib/resetsync.py | 16 ++++++++++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)
 create mode 100644 nmigen/compat/genlib/resetsync.py

diff --git a/doc/COMPAT_SUMMARY.md b/doc/COMPAT_SUMMARY.md
index 0b2eb4a..8b1ed53 100644
--- a/doc/COMPAT_SUMMARY.md
+++ b/doc/COMPAT_SUMMARY.md
@@ -173,8 +173,8 @@ Compatibility summary
       - (−) `layout_get` **brk**
       - (−) `layout_partial` **brk**
       - (−) `Record` id
-    - (−) `resetsync` ?
-      - (−) `AsyncResetSynchronizer` ?
+    - (+) `resetsync` ?
+      - (+) `AsyncResetSynchronizer` **obs** → `.lib.cdc.ResetSynchronizer`
     - (−) `roundrobin` ?
       - (−) `SP_WITHDRAW`/`SP_CE` ?
       - (−) `RoundRobin` ?
diff --git a/nmigen/compat/genlib/resetsync.py b/nmigen/compat/genlib/resetsync.py
new file mode 100644
index 0000000..218dc8a
--- /dev/null
+++ b/nmigen/compat/genlib/resetsync.py
@@ -0,0 +1,16 @@
+from ...tools import deprecated
+from ...lib.cdc import ResetSynchronizer as NativeResetSynchronizer
+
+
+__all__ = ["AsyncResetSynchronizer"]
+
+
+@deprecated("instead of `migen.genlib.resetsync.AsyncResetSynchronizer`, "
+            "use `nmigen.lib.cdc.ResetSynchronizer`; note that ResetSynchronizer accepts "
+            "a clock domain name as an argument, not a clock domain object")
+class CompatResetSynchronizer(NativeResetSynchronizer):
+    def __init__(self, cd, async_reset):
+        super().__init__(async_reset, cd.name)
+
+
+AsyncResetSynchronizer = CompatResetSynchronizer
-- 
2.30.2